Are these your comparisons? I'd guess so. If Kevin Looney's ceiling is Antwan Jamison, who I believe was a multi-time all star and one of the leagues 30 or so best players in his prime and Myles Turner's ceiling is Jajuan Johnson, a guy picked last in the 1st round by the C's and washed out of the league in a few years, I'll take that to mean you don't like Turner much.
Personally, I like Winslow, Johnson and WCS as guys we could trade up for realistically if DA really likes them. Would fill major needs and would have good potential. Just depends on the assets needed to move up.